Binary Distillation Water / n-Butanol System. A saturated liquid feed of 500 mol/hr containing 40 mole % water is to be fractionated at 101.325kPa (abs) in order to form a distillate containing 70 mole % water and a bottoms product of 10 mole % water. NOTE: This is actually NOT an ideal solution.use the Raoult’s Law data Assume a distillate reflux ratio (if necessary) of 3:1. a) Calculate the flowrates (mol/hr) of the distillate and bottoms. b) Determine the theoretical number of trays and the feed tray number for the specified operation. c) Determine the minimum reflux ratio, RMIN and the minimum number of theoretical trays at total reflux
Binary Distillation Water / n-Butanol System. A saturated liquid feed of 500 mol/hr containing 40 mole % water is to be fractionated at 101.325kPa (abs) in order to form a distillate containing 70 mole % water and a bottoms product of 10 mole % water. NOTE: This is actually NOT an ideal solution.use the Raoult’s Law data Assume a distillate reflux ratio (if necessary) of 3:1. a) Calculate the flowrates (mol/hr) of the distillate and bottoms. b) Determine the theoretical number of trays and the feed tray number for the specified operation. c) Determine the minimum reflux ratio, RMIN and the minimum number of theoretical trays at total reflux
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Binary Distillation
Water / n-Butanol System.
A saturated liquid feed of 500 mol/hr containing 40 mole % water is to be fractionated at 101.325kPa (abs)
in order to form a distillate containing 70 mole % water and a bottoms product of 10 mole % water.
NOTE: This is actually NOT an ideal solution.use the Raoult’s Law data
Assume a distillate reflux ratio (if necessary) of 3:1.
a) Calculate the flowrates (mol/hr) of the distillate and bottoms.
b) Determine the theoretical number of trays and the feed tray number for the specified operation.
c) Determine the minimum reflux ratio, RMIN and the minimum number of theoretical trays at total reflux
| Vapor Pressure | ||||||
| Temperature | water | n-butanol | ||||
| T (F) | T (K) | T (C) | kPa | kPa | x | y |
| 212.2 | 373.2 | 100.1 | 101.498 | 51.828 | 1.000 | 1.000 |
| 215.7 | 375.2 | 102.0 | 108.8 | 56.080 | 0.861 | 0.923 |
| 219.2 | 377.1 | 104.0 | 116.6 | 60.613 | 0.730 | 0.839 |
| 222.8 | 379.1 | 106.0 | 124.8 | 65.442 | 0.607 | 0.747 |
| 226.3 | 381.1 | 107.9 | 133.5 | 70.582 | 0.491 | 0.646 |
| 229.9 | 383.0 | 109.9 | 142.7 | 76.047 | 0.382 | 0.537 |
| 233.4 | 385.0 | 111.9 | 152.4 | 81.853 | 0.279 | 0.418 |
| 236.9 | 387.0 | 113.8 | 162.6 | 88.015 | 0.181 | 0.290 |
| 240.5 | 388.9 | 115.8 | 173.4 | 94.549 | 0.088 | 0.151 |
| 244.0 | 390.9 | 117.8 | 184.8 | 101.471 | 0.000 | 0.000 |
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Could you resolve the problem using the experimental data provided. How are the results different?
| Experimental Data - Water & n-Butanol | ||
| T [K] | x | y |
| 0.000 | 0.000 | |
| 384.1 | 0.050 | 0.253 |
| 380.0 | 0.092 | 0.388 |
| 379.6 | 0.097 | 0.402 |
| 374.0 | 0.181 | 0.556 |
| 369.8 | 0.291 | 0.660 |
| 369.5 | 0.303 | 0.666 |
| 367.2 | 0.417 | 0.724 |
| 366.2 | 0.546 | 0.750 |
| 366.2 | 0.550 | 0.753 |
| 365.9 | 0.752 | 0.754 |
| 365.9 | 0.902 | 0.754 |
| 366.0 | 0.980 | 0.760 |
| 366.0 | 0.981 | 0.763 |
| 368.6 | 0.991 | 0.839 |
| 369.0 | 0.992 | 0.850 |
| 1.000 | 1.000 |
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